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Journal of Biomedical Optics • Open Access

Is the red fluorescence of dental plaque related to its cariogenicity?
Author(s): Daniela G. Bittar; Laura Regina A. Pontes; Ana Flávia B. Calvo; Tatiane F. Novaes; Mariana M. Braga; Patricia M. Freitas; Cinthia P. Tabchoury; Fausto M. Mendes

Paper Abstract

It has been speculated that the red fluorescence emitted by dental plaque could be related to its cariogenicity. To test this hypothesis, we designed this crossover <italic<in situ</italic< study, with two experimental phases of 14 days each. Seventeen volunteers, wearing a palatal appliance with bovine enamel blocks, were instructed to drip a 20% sucrose solution (experimental group) or purified water (control group) onto the enamel blocks eight times daily. The specimens were removed after 4, 7, 10, and 14 days, and the red fluorescence of dental plaque formed on the enamel blocks was assessed using a quantitative light-induced fluorescence device. After the plaque removal, surface and cross-sectional microhardness tests were performed to assess the mineral loss. The comparisons were made by a multilevel linear regression analysis. We observed a significant increase in the red fluorescence of the dental plaque after longer periods of formation, but this trend was verified in both groups. The mineral loss assessed by the microhardness techniques, contrariwise, showed a significant increase only in the experimental group. In conclusion, the red fluorescence emitted by the dental plaque indicates a mature biofilm, but this fact is not necessarily associated with its cariogenicity.

Paper Details

Date Published: 27 June 2014
PDF: 6 pages
J. Biomed. Opt. 19(6) 065004 doi: 10.1117/1.JBO.19.6.065004
Published in: Journal of Biomedical Optics Volume 19, Issue 6
Show Author Affiliations
Daniela G. Bittar, Univ. de São Paulo (Brazil)
Laura Regina A. Pontes, Univ. de São Paulo (Brazil)
Ana Flávia B. Calvo, Univ. de São Paulo (Brazil)
Faculdade de Odontologia de Piracicaba (Brazil)
Tatiane F. Novaes, Univ. de São Paulo (Brazil)
Mariana M. Braga, Univ. de São Paulo (Brazil)
Patricia M. Freitas, Univ. de São Paulo (Brazil)
Cinthia P. Tabchoury, Faculdade de Odontologia de Piracicaba (Brazil)
Fausto M. Mendes, Univ. de São Paulo (Brazil)

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